Français de l'étranger – SNCF - Carte familles nombreuses - Français de l'étranger

This written question concerns the eligibility of French citizens living abroad for the 'Carte familles nombreuses' (large family card) offered by the French national railway company (SNCF). It seeks clarification on how this benefit is applied to expatriates. The question affects French citizens residing outside of France who have large families and wish to benefit from reduced fares on train travel within France.